20281-28-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20281-28-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,8 and 1 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 20281-28:
(7*2)+(6*0)+(5*2)+(4*8)+(3*1)+(2*2)+(1*8)=71
71 % 10 = 1
So 20281-28-1 is a valid CAS Registry Number.